Cryptic crossword

ACROSS

1. Presumably the unmarried would be game for it (7,5)

7. A let off for anyone in an emotional state (5)

8. New or changed person with title (5)

9. Strike that has to be a great success (3)

10. Suddenly getting everyone together? (3,2,4)

11. Try air – it’s seldom found (6)

12. Leave suddenly to produce copies on machine (3,3)

15. Writer out to make a killing? (6,3)

17. Result of setting fire to a tree (3)

18. The scoundrel has to go back in regret (5)

19. Scent of marjoram or aniseed wafted back (5)

21. Eminent musician? (6,2,4)

DOWN

1. An explosive educational matter? (6,6)

2. Don’t stand for untruth! (3)

3. It’s easy to construct awful 2s about politician (6)

4. Parade ground order concerning new development (5,4)

5. Is able to offer no rise to clergyman (5)

6. There’s nothing to pay with no case to answer (4,2,6)

7. About 50 rise high from the sun (5)

10. He’s sour at writer (9)

13. State of a tomahawk (5)

14. Injury right in the country (6)

16. Fireplace in mountain glen (5)

20. Lout takes a pound off bread (3)